/*
 *	Generate the syscall functions
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "syscall_name.h"

static char namebuf[128];

static void write_call(int n)
{
  FILE *fp;
  snprintf(namebuf, 128, "fuzix6809/syscall_%s.s", syscall_name[n]);
  fp = fopen(namebuf, "w");
  if (fp == NULL) {
    perror(namebuf);
    exit(1);
  }
  fprintf(fp, "\t.area .text\n\n"
	      "\t.globl __syscall\n"
	      "\t.globl __syscall_mangled\n"
	      "\t.globl _%1$s\n\n"
	      "_%1$s:\n", syscall_name[n]);
  if (syscall_args[n] == VARARGS) {
	/* Mangle into fastcall like the others: */
	/* get return address and X (first argument) */
	/* then put return address back */
	fprintf(fp, "\tpuls d,x\n"
		    "\tpshs d\n"
		    "\tldd #%d\n"
		    "\tjmp __syscall_mangled\n", n);
  } else {
	fprintf(fp, "\tldd #%d\n"
		    "\tjmp __syscall\n", n);
  }
  fclose(fp);
}

static void write_call_table(void)
{
  int i;
  for (i = 0; i < NR_SYSCALL; i++)
    write_call(i);
}

static void write_makefile(void)
{
  int i;
  FILE *fp = fopen("fuzix6809/Makefile", "w");
  if (fp == NULL) {
    perror("Makefile");
    exit(1);
  }
  fprintf(fp, "# Autogenerated by tools/syscall_6809\n");
  fprintf(fp, "CROSS_AS=m6809-unknown-as\nCROSS_LD=m6809-unknown-ld\nCROSS_AR=m6809-unknown-ar\n");
  fprintf(fp, "ASOPTS=\n\n");
  fprintf(fp, "ASYS=syscall$(PLATFORM).s\n");
  fprintf(fp, "ASRCS = syscall_%s.s\n", syscall_name[0]);
  for (i = 1; i < NR_SYSCALL; i++)
    fprintf(fp, "ASRCS += syscall_%s.s\n", syscall_name[i]);
  fprintf(fp, "\n\nASRCALL = $(ASRCS) $(ASYS)\n");
  fprintf(fp, "\nAOBJS = $(ASRCALL:.s=.o)\n\n");
  fprintf(fp, "syslib.lib: $(AOBJS)\n");
  fprintf(fp, "\techo $(AOBJS) >syslib.l\n");
  fprintf(fp, "\t$(CROSS_AR) rc syslib.lib $(AOBJS)\n\n");
  fprintf(fp, "$(AOBJS): %%.o: %%.s\n");
  fprintf(fp, "\t$(CROSS_AS) $(ASOPTS) -o $*.o $<\n\n");
  fprintf(fp, "clean:\n");
  fprintf(fp, "\trm -f $(AOBJS) $(ASRCS) syslib.lib syslib.l *~\n\n");
  fclose(fp);
}

int main(int argc, char *argv[])
{
  write_makefile();
  write_call_table();
  exit(0);
}
